netdev: Add addr_list_lock to struct net_device.
This will be used to protect the per-device unicast and multicast
address lists, as well as the callbacks into the drivers which
configure such state such as ->set_rx_mode() and ->set_multicast_list().
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index ba5c463..fd03652 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -609,6 +609,7 @@
unsigned char addr_len; /* hardware address length */
unsigned short dev_id; /* for shared network cards */
+ spinlock_t addr_list_lock;
struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
int uc_count; /* Number of installed ucasts */
int uc_promisc;
diff --git a/net/core/dev.c b/net/core/dev.c
index feaab489..d933d1b 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3836,6 +3836,7 @@
BUG_ON(!dev_net(dev));
net = dev_net(dev);
+ spin_lock_init(&dev->addr_list_lock);
netdev_init_queue_locks(dev);
dev->iflink = -1;